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<div class="moz-cite-prefix">Hi, <br>
<br>
I posted the minutes of the controls meeting on the wiki page:<br>
<br>
<a class="moz-txt-link-freetext" href="https://halldweb1.jlab.org/wiki/index.php/Controls_Meeting_8-Jan-2015#Minutes">https://halldweb1.jlab.org/wiki/index.php/Controls_Meeting_8-Jan-2015#Minutes</a><br>
<br>
and also pasted them below. <br>
<br>
Best, <br>
Hovanes. <br>
<br>
<br>
<h2><span class="mw-headline" id="Minutes">Minutes </span></h2>
<p>Present: Dave, Mark, Scot, Hovanes
</p>
<h4><span class="editsection">[<a
href="https://halldweb1.jlab.org/wiki/index.php?title=Controls_Meeting_8-Jan-2015&action=edit&section=3"
title="Edit section: Announcements">edit</a>]</span> <span
class="mw-headline" id="Announcements"> Announcements</span></h4>
<ul>
<li> Yi will be leaving at the end of January. Hall D group
needs to learn the slow controls subsystem that Yi has
developed. Dave and Brian are looking into the PXI system for
the solenoid. </li>
</ul>
<h4><span class="editsection">[<a
href="https://halldweb1.jlab.org/wiki/index.php?title=Controls_Meeting_8-Jan-2015&action=edit&section=4"
title="Edit section: Gas system">edit</a>]</span> <span
class="mw-headline" id="Gas_system"> Gas system </span></h4>
<ul>
<li> Dave will be working on the gas system controls. Namely he
will implement the communications between PLC and the Brooks
controllers to be able to set the most parameters in the
controller downstairs from PLC. We would like to be able to
change the flow or to completely shut off the valves in the
MFC in the hall from the hall. </li>
<li> Dave also suggested to have a NC solenoid valve for each
FDC package so that we do not need to rely on the serial
communications in case of emergency. It was pointed out that
this is something that may trigger a review, the FDC group
needs to make decisions on that.
</li>
</ul>
<h4><span class="editsection">[<a
href="https://halldweb1.jlab.org/wiki/index.php?title=Controls_Meeting_8-Jan-2015&action=edit&section=5"
title="Edit section: Remote reset of CAENs">edit</a>]</span>
<span class="mw-headline" id="Remote_reset_of_CAENs"> Remote
reset of CAENs </span></h4>
<ul>
<li> Dave have plans for redoing the remote reset for CAENs
without using 5V output modules that currently kill the HV
from CAEN each time PLC is rebooted. </li>
<li> This may require additional purchases of PLC equipment,
Hovanes will ask Eugene about POA.
</li>
</ul>
<h4><span class="editsection">[<a
href="https://halldweb1.jlab.org/wiki/index.php?title=Controls_Meeting_8-Jan-2015&action=edit&section=6"
title="Edit section: Warm magnet power supplies">edit</a>]</span>
<span class="mw-headline" id="Warm_magnet_power_supplies"> Warm
magnet power supplies </span></h4>
<ul>
<li> The procedures for TAG5C and SWEEP magnet ramping require
approching the desired setpoint from above after staying near
the saturation point for a while. </li>
<li> During the fall run we had incidents for both PS and tagger
where the magnet currents were not raised to the <b>maximum</b>
values before putting them at the nominal setpoint. </li>
<li> Accelerator magnets approach their desired setpoints from
below after looping multiple times for degaussing, so the
existing software does not accommodate TAG5C and SWEEP, but
probably can be modified to execute our simple loop. </li>
<li> Hovanes will talk to Gary about making such changes.
</li>
</ul>
<h3><span class="editsection">[<a
href="https://halldweb1.jlab.org/wiki/index.php?title=Controls_Meeting_8-Jan-2015&action=edit&section=7"
title="Edit section: Solenoid controls work">edit</a>]</span>
<span class="mw-headline" id="Solenoid_controls_work"> Solenoid
controls work </span></h3>
<ul>
<li> Mark would like to have the correct time maintained on the
solenoid power supply. He thinks the precision might be
limited to 1sec by the power supply, but he will be check
that. </li>
<li> Dave is planning to implement some mechanism by which the
time will be transferred from PLC to the power supply either
periodically or upon some condition being satisfied. He would
like to have a PLC tag connected to EPICS that reports a
correct time. </li>
<li> Hovanes suggested to use the time from EPICS/PLC interface
IOC for the solenoid. He will send Dave the name of the tag,
and Dave will take care of the conversion. Hovanes will also
see if the server on which the production version of that IOC
is running can be synced with JLab time servers. </li>
<li> Flow meters for the leads will be replaced by Scot. </li>
<li> Dave is considering a possibility of being able to stop a
slow dump and ramping PS back to the setpoint. This might not
be so easy, if not impossible, to do without going to the fast
dump, according to Mark. </li>
<li> New liquid level sensor will be installed and needs to be
integrated with the controls system.
</li>
<li> Monitoring circuit for GFD is being worked on by Mark. </li>
</ul>
<h4><span class="editsection">[<a
href="https://halldweb1.jlab.org/wiki/index.php?title=Controls_Meeting_8-Jan-2015&action=edit&section=8"
title="Edit section: More alarms">edit</a>]</span> <span
class="mw-headline" id="More_alarms"> More alarms </span></h4>
<ul>
<li> Mark will send Hovanes a list of LCW quantities which will
be useful to have in the magnet section of the Hall D alarm
system. </li>
<li> Scot suggested to have the hall humidities and temperatures
in the alarm system as well. Hovanes will add them.
</li>
</ul>
<h4><span class="editsection">[<a
href="https://halldweb1.jlab.org/wiki/index.php?title=Controls_Meeting_8-Jan-2015&action=edit&section=9"
title="Edit section: Other items">edit</a>]</span> <span
class="mw-headline" id="Other_items"> Other items </span></h4>
<ul>
<li> Two more motors will probably be installed for April
running: beam profiler in front of the collimator and the
polarimeter target in front of the east wall of the collimator
cave. </li>
<li> The specs for the polarimeter target motion system is still
not well known, the details are coming in. </li>
<li> The stage for the beam profiler is being designed, the
cabling is expected to be very similar to collimator and
harps. </li>
<li> Target controls by the JLAB target group is pretty much
done. They implemented the target controls in compact-RIO, but
have an EPICS CA-server (or IOC) to interface it with Hall D
EPICS. The target group needs a Windows PC in the counting
house. we can share the halldsc7 that Dave is using for PLC
with them. Hovanes will setup a meeting with the target group
to work out the details of integration.
</li>
<li> Scot reminded us that TAC motor needs to be tested. It has
been locked-out/tagged-out during the last fall running.
Hovanes will get together and check that the TAC stage is
fine.
</li>
</ul>
<br>
<br>
On 01/07/2015 09:48 AM, Hovanes Egiyan wrote:<br>
</div>
<blockquote cite="mid:54AD4745.9020409@gmail.com" type="cite">Happy
New Year,
<br>
<br>
We should restart having our regular Hall D controls meetings this
week.
<br>
We will have our Hall D slow controls meeting on January 8, 2015,
<br>
at 9:30am in A110. I posted the preliminary agenda on the wiki
page:
<br>
<br>
<a class="moz-txt-link-freetext" href="https://halldweb1.jlab.org/wiki/index.php/Controls_Meeting_8-Jan-2015">https://halldweb1.jlab.org/wiki/index.php/Controls_Meeting_8-Jan-2015</a>
<br>
<br>
The main topics of the meeting will be short updates on what each
of
<br>
us is working or will be working for the April engineering run.
<br>
Please, feel free to add your topics for discussion to the agenda.
<br>
<br>
Hovanes.
<br>
</blockquote>
<br>
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